Polycaprolactone foam functionalized with chitosan microparticles - a suitable scaffold for cartilage regeneration

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Biodegradable porous scaffolds are crucial for cartilage regeneration, requiring adequate cell growth, differentiation, and mechanical properties.
• Poly-epsilon-caprolactone (PCL) and chitosan are biocompatible polymers often explored for scaffold development.
• Improving the biomechanical properties of scaffolds is essential for their clinical applicability.

Purpose of the Study:

• To prepare biocompatible foam scaffolds with enhanced biomechanical properties for cartilage regeneration.
• To investigate the effect of incorporating chitosan microparticles into PCL scaffolds.
• To evaluate the cell compatibility and mechanical characteristics of the developed scaffolds.

Main Methods:

• Foam scaffolds were fabricated using poly-epsilon-caprolactone (PCL) and varying concentrations of chitosan microparticles (0, 10, 20 wt%).
• The salt leaching technique with sodium chloride (NaCl) as a porogen was employed for scaffold preparation.
• Scaffold properties, including DNA content and viscoelasticity, were assessed over a 22-day experimental period.

Main Results:

• PCL scaffolds with 0 and 10 wt% chitosan exhibited higher DNA content compared to those with higher chitosan concentrations.
• Scaffolds made from 10 wt% PCL with 10 and 20 wt% chitosan demonstrated significantly improved viscoelastic properties.
• A comparison revealed that 15 wt% PCL scaffolds with 0 and 10 wt% chitosan had lower viscoelasticity.

Conclusions:

• 10 wt% PCL scaffolds incorporating 0 wt% and 10 wt% chitosan are identified as promising candidates for cartilage regeneration.
• The study highlights the potential of combining PCL and chitosan to achieve desired scaffold properties.
• Further research may focus on optimizing the PCL-chitosan ratio for enhanced cartilage tissue engineering outcomes.